79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
package basic
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import "image"
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import "image/color"
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import "git.tebibyte.media/sashakoshka/tomo"
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import "git.tebibyte.media/sashakoshka/tomo/theme"
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import "git.tebibyte.media/sashakoshka/tomo/artist"
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import "git.tebibyte.media/sashakoshka/tomo/elements/core"
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// Test is a simple element that can be used as a placeholder.
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type Test struct {
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*core.Core
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core core.CoreControl
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drawing bool
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color tomo.Image
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lastMousePos image.Point
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}
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// NewTest creates a new test element.
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func NewTest () (element *Test) {
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element = &Test { }
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element.Core, element.core = core.NewCore(element)
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element.core.SetMinimumSize(32, 32)
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element.color = artist.NewUniform(color.Black)
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return
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}
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func (element *Test) Handle (event tomo.Event) {
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switch event.(type) {
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case tomo.EventResize:
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resizeEvent := event.(tomo.EventResize)
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element.core.AllocateCanvas (
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resizeEvent.Width,
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resizeEvent.Height)
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artist.Rectangle (
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element.core,
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theme.AccentImage(),
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artist.NewUniform(color.Black),
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1, element.Bounds())
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artist.Line (
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element.core, artist.NewUniform(color.White), 1,
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image.Pt(1, 1),
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image.Pt(resizeEvent.Width - 2, resizeEvent.Height - 2))
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artist.Line (
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element.core, artist.NewUniform(color.White), 1,
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image.Pt(1, resizeEvent.Height - 2),
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image.Pt(resizeEvent.Width - 2, 1))
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case tomo.EventMouseDown:
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element.drawing = true
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mouseDownEvent := event.(tomo.EventMouseDown)
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element.lastMousePos = image.Pt (
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mouseDownEvent.X,
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mouseDownEvent.Y)
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case tomo.EventMouseUp:
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element.drawing = false
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mouseUpEvent := event.(tomo.EventMouseUp)
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mousePos := image.Pt (
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mouseUpEvent.X,
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mouseUpEvent.Y)
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element.core.PushRegion (artist.Line (
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element.core, element.color, 1,
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element.lastMousePos, mousePos))
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element.lastMousePos = mousePos
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case tomo.EventMouseMove:
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mouseMoveEvent := event.(tomo.EventMouseMove)
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mousePos := image.Pt (
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mouseMoveEvent.X,
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mouseMoveEvent.Y)
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element.core.PushRegion (artist.Line (
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element.core, element.color, 1,
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element.lastMousePos, mousePos))
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element.lastMousePos = mousePos
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}
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return
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}
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